Does anyone have a decent gauge for shelf life for premium self defense ammo? Does a year sounds reasonable.....or too early?

As already mentioned,,,,how it's stored is more important than how long it's stored.

Using fresh ammunition for defense is something I class as - something I can control.

In the manner of, take care of all the details and the big problem is solved,,,I like to address all the things I have control over so they don't pop up unexpectedly when something beyond my control happens..